how can i use a push button as a kill switch?

 

a switch is a switch...

 

What kind of push button switch, momentary, [closed only as long as button is pushed] or latching, [push to turn on push again to turn off]?

 

momentary push

 

What exactly are you trying to do?
If you are trying to kill something so your car won't start this is not the switch to use because it has to be "on" to start the car and the only way a momentary push will be "on" is for you to hold it...

 

well i was thinking of something, cut the ignition wire that leads to the started, take the fuse box off, rewire it, hide the switch so that i can just kick it, or push it in as i crank the engine, and bam done i think. unless it has to keep feeding power, i don't know if you guys know that i mean, would like some opinions

 

You can use the switch to control a latching relay, the latching relay can be installed on any wire you want, it will latch, [close] when the ign. is turned on and you press the momentary switch, [button], it will stay latched until you turn the ign. switch off, [passive "arming"], a latching relay can be made with two standard automotive SPDT relays. 94

 

can i have a step by step on how to do it, or like a wiring diagram or something please, and thanks for your help

 

You need two SPDT relays, call them relay 1 and relay 2.

Relay 1 is the "kill" relay so #30 ands #87 will be from the cut ends of whatever wire your "killing", [starter, ign. power or grounds to ECU/ECM and so on], it makes no diff. if the lead you cut is pos.(+) or neg.(-) low or high current.

#85 of relay 1 needs a "true ign", [hot in run and start] should be a fused line, [5A max].
#86 of relay 1 connects to #87 of relay 2.

Relay 2 is the latching relay so #30 goes to chassis ground and #87 is connected, [daisy chained] to #86 and #86 is also connected to one side of the momentary switch, other side of switch goes to chassis ground.

#85 of relay 2 also needs a "true ign.", can be the same fuse lead as goes to #85 of relay 1

Yes, #86 of relay 1 and #87 and #86 of relay 2 are all connected together, [daisy chained] and go to the momentary switch, when the ign. is on and you press the switch a ground will be supplied to #85 of both relays, energizing them, when relay 2 is energized it will connect #30, [ground] and #87, #87 will in turn supply the ground needed to "latch" the relays.

When the ign. is turned off the relays will de-energize and the connection of #30 and #87 of relay one will open. 94

 

thanks that's exactly what i was thinking of, just didn't know how to do it

 

There is no "ignition lead to the starter". Ignition is one circuit. Starter is a separate circuit.

I would interrupt the starter wire with a relay, then have the momentary pushbutton (normally open) control the relay. Hold the button down while cranking.

But that wouldn't be very effective. Main relay kill is the way to go.

 

So I took a stab at creating a schematic from your post and I was hoping you could take a look at it

Hopefully I got it all right It looks a little different than the schematic on the12volt.com

 

this sounds interesting

 

Hold the button down while cranking the key.

 

That is correct , except #85 of relays, [12V+] must be 12V+ true ign., hot id run and start only, or relays will not de-latch.

Hatch, your single relay works fine on the starter lead, it will not work on any other lead. 94

 

wire it to your horn or so you have to switch your radio to FM by using the power antenna wire.

 

If you have a steering wheel with two horn buttons, or an aftermarket, wire it to the horn is the best place. Whos gonna hit the horn button in the middle of the night when trying to steal it, Theifs are not going to think of testing out the horn button in the middle of the night when they are stealing cars. To risky to try. Just my advice

 

Damn, thats a good *** idea! :up:
Now I wish I didnt have my nitrous button hooked up to my horn lol

I was thinking about using the AC button as well (since I dont have AC), but not sure how the wiring on that is.

 

thats a pretty good idea if only i didnt suck at reading diagrams this would be my next project